Dust-guard.



No. 757,466. PATENTED APR. 19, 1904. E. JAGQUEMIN.

DUST GUARD.

APPLIOATION FILED JUNE 18, 1900.

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UNITED I STATES Patented April 19, 1904.

PATENT OFFICE.

EUGENE JAOQUEMIN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- FOURTH TO DAVID H. HOWELL, OF MINNEAPOLIS, MINNESOTA.

DUST-GUARD.

SPECIFICATION forming part of Letters Patent No. 757,466, dated April 19, 1904.

Application filed June 18, 1900.

To all whom, it may concern:

Be it known that I, EUGENE J ACQUEMIN, of the city of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Dust-Guards, of which the following is a specification.

My invention relates to dust-guards for the axle-bearings of railway and railroad cars; and the object of my invention is to provide means to exclude dust from the journal-boxes of car-trucks; and the particular object of my invention is to provide a dust-guard which will absolutely exclude dust and which will prevent the escape of oil around the axle and which will be cheap to manufacture, use, and keep in repair.

My invention consists generally in a dustguard comprising a plate provided with an axle-hole, in combination with a plurality of light'bearing blocks or strips held in an annular groove in said plate, the whole being'of a peculiar and novel construction, all as hereinafter described, and particularly pointed out in the claims.

The invention will be more readily understood by reference to the accompanying drawings, in which Figure 1 is a longitudinal vertical section of a car-axle box and a dust-guard embodying my invention. Fig. 2 is an enlarged section of the guard on the line y y of Fig. 3 similar to that shown in Fig. 1, but with the axle removed. Fig. 3 is a transverse section on the line 00 w of Fig. 2. Fig. 4: is a sectional view on the line 2 a of Fig. 5 similar to Fig. 2, but showing the bearing blocks or strips as they appear when projected to admit the last block or section. Fig. 5 is a transverse section on the line a a of Fig. 4: and similar to Fig. 3. Fig. 6 is a diagonal section on the line @010 of Fig. 3. Fig. 7 is a perspective view ofthe spring. Fig. 8 shows the back of one of the bearing blocks or sections. Fig. 9 shows the guide-pin.

As shown in the drawings, 2 represents the car-axle, 3 the journal or brass, and 4 the j ournal-box. Theinner end'of the box is provided with a pocket 5 for the dust-guard and is provided with a large oblong hole 6 for the Serial No. 20,642. (No model.)

axle 2. Unless this hole 6 is closed around the axle oil will be lost from the journal-box and dust and grit will collect in the journalbox to such an extent as to seriously interfere with the journal and proper lubrication.

My dust-guard comprises the solid block, plate, or board 7 of wood, provided with a hole 8, that is very little larger than the axle and through which the axle is inserted into the journal-box. The block or board 7 is made of a size to fit the pocket 5 quite snugly and is provided with means to close the top of the pocket to prevent dust from Working down back of the guard therein. This means consists of the strip 9, of cloth, felt, leather, rubber, or like flexible material, that is laid across the top of the block or board 7, which is provided with a V-groove 10 to receive the same. The strip 9 is held in place by the molding-strip 11, which is of substantially the same width or thickness as the block or board 7. The edges of the strip 9, of flexible material, extend beyond the sides and ends of the board 7, and said board is of such dimension that when the same is in place in the pocket the top of the board will be below the top of the journal-box, so that the flexible strip 9 is pressed firmly against the walls of the pocket 5 at thetop thereof. In this manner I am enabled to tightly close or seal the top of the dust-guard pocket, even though the casting which comprises the journal-box may be very rough and irregular; The arrangement of the strip in a V-groove in the top of the dust-guard so that the edges of the flexible strip incline upwardly is'of a special advantage, for when the guard is pushed up in the in the box all of the dust, cinders, &c., that have collected on top of the guard will be pushed out of the pocket, and yet'there is no tendency to draw dust down into the pocket when the guard is again drawn down to, its normal position. j

I prefer to make the dust-guard out of a single piece of wood with the grain of the wood running vertically of the dust-guard,

I and to strengthen the same I employ the long rivets or bolts 12, that are driven clear through pocket by an upward movement of the axle steel wire.

the guard, both above and below the? hole therein. On account of these rivets or bolts my guard may split in a number of places while in use and still retain its usefulness.

Another and the particular novel feature of my invention resides in the means for making a tight joint or hearing for the guard around the axle. This means comprises a plurality of curved sections or blocks 14,

identical in size and shape and together makj ing up a clrcle or annular ring within the guard. These blocks are arranged in an annular groove 15, made in the walls of the axlehole 8. The blocks or sections fit the grooves snugly, but are capable of easy movement in the groove toward or from the center of the hole. The blocks are held upon or toward the axle by a spring ring 16, extending around the circle of sections 14 and preferably lying in grooves 17 provided in the backs of said sections. The spring-ring is preferably composed of two wraps or turns of The blocks 14 are provided with overlapping ends 18, so that there are no openings or gaps between the ends of the blocks or sections, and to prevent the sections from being held apart or opened by dust that might collect or gum that might form between the ends or shoulders of the sections I prefer to bevel the ends 18 of the sections, as shown in Figs. 2 to 6 and 8. The sharp edges and ends thus provided effectually force and wedge out any'collected gum or dust as the ring of sections contracts around the axle.

The circumference of the ring of sections even when contracted to the fullest extentthat is, when the ends of the sections are brought together by the pressure of the encircling spring-is greater than the circumference of the hole 8 in the board 7, so that even after said sections have been worn thin they will still be retained in the groove 15. The sections are made of such length, counting their overlapping ends, that when first placed upon the axle the shoulders of the sectionswill be quite widely separated, leaving a large play for wear. The largest normal diameter of the ring of sections is the diameter thereof when the sections are new and are first placed upon the axle. The diameter of the groove 15 measured across the hole or opening 8 is equal to or exceeds the largest normal diameter of the ring of sections. As before explained, the ring of sections even when contracted is larger than the hole 8, so that said ring cannot be put together and afterward put into the guard or board 7. This could only be done with the guard made in two or more parts, which is undesirable, the solid, rigid, or single-piece board7 being much preferred. As the ring cannot be put into the guard as a whole, it is necessary to first put the spring-ring 16, which may be collapsed, into the groove 15 and then expand the ring 16, after which the sections may be put into the groove one at a time, three of the sections being butted together closely, so as to make room for the fourth or last section. 14 of the ring. The overlapping ends of the sections 14 thus permit the sections to be put into the groove. one by one, after which the spring-ring is permitted to contract and close the blocks or sections together end to end, in which condition they remain until forced apart or opened slightly by the insertion of the axle. In order to facilitate the assembling of the sections of the bearing-ring, I prefer to make the groove 15 somewhat deeper than is necessary to accommodate the ring at its largest normal diameter-that is, the diameter of a new sectional ring as it stands when first placed upon an axle.

To prevent the rotation of the ring of sections 14 with the axle and to guide the sections in and out, I prefer to provide each section with a radial groove or slot 19 and drive a square-headed pin or nail 20 into said groove or recess at the side of the groove 15 and into the solid part of the wooden block or board 7. To prevent interference between the pin .or nail and the spring 16 on the backs of the sections, I prefer to offset the point 21 of the nail, as shown in Figs. 6 and 9. The squareshouldered pin or nail is much to be preferred to a round pin, upon which the sections might wedge and tend to split the guard of wood or other suitable material. Various inflexible materials may be used in the manufacture of the sections 14; but I prefer to employ Babbitt metal as a most effective bearing and packing and a novelty in dust-guards.

The terms solid, rigid, or single piece herein employed as describing the board 7 are intended to define a dust-guard the main member of which is inflexibleand non-adjust= able as contrasted with the common sectional dust-guard, and the terms inflexible and "metallic as herein applied with relation to the sections of the packing-ring are intended to distinguish my invention from the guards hitherto devised, wherein only flexible materials have been employed in the packing, whether of an adjustable or fixed character,

It is obvious that various modifications of my invention will readily suggest themselves to those skilled in the art, and I therefore do not confine my invention to the specific constructions herein shown and described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The dust-guard, comprising the board. 7 provided with an axle-hole and a groove 15, in combination with the ring of sections provided in said groove, encircling means holding and tending to compress said ring of sections, there being a square-shouldered groove in one or more of said sections and a square-shouldered pin or nail engaged therewith and driven into said board, substantially as described.

2. The dust-guard, comprising the board 7 provided with the axle-hole and the groove 15, in combination with the ring of metallic sections and a compression-spring provided in said groove, radial guide-grooves and pins or spikes preventing the rotation of said ring in said groove, substantially as described.

3. Thedust-guard, comprising the singlepiece board 7 provided with the axle-hole and the groove 15, in combination with the ring of metallic sections provided in said groove and having overlapping ends, a compressionspring'encircling said ring of sections, and the guide-pins for said sections occupying radial positions in said groove and preventing the rotation of the ring of sections substantially as described.

4:. The dust-guard, comprising the guard proper provided with an axle-hole and having a V-groove in itsupper edge, in combinationv with the flexible strip 9, a fastening or molding 11 whereby said strip .is secured in said groove and the edges of said strip projecting beyond the surfaces of said board, as and for the purpose specified.

5. The bearing or packing ring for dustguards comprising a plurality of curved metallic sections 14 provided with radial guidegrooves and having spring-retaining grooves, and retaining nails or pins for same, in combination With a compression-spring inclosing the ring of sections, substantially as described.

6. The dust-guard, comprising the board provided with an axle-hole and an annular groove 15, the packing-ring arranged in said groove and composed of inflexible sections of substantially the same width as said groove and having reduced ends which are overlapped, a compression-spring inclosing the ring of sections, grooves 19 and pins 20 for preventing 4 the rotation of said ring in said board but permitting the expansion and contraction thereof in said groove, substantially as described.

In testimony whereof I have hereunto set my hand, this 1 1th day of June, 1900, at Minneapolis, Minnnesota.

EUGENE JACQUEMIN.

In presence of G. G. HAWLEY, FRED H. BOWERSOOK. 

